Kel-Tec has been known for coming up with interesting designs that doesn't follow the trend and there has been some interesting guns out of their lab. RDB is the latest model and it is projected to be ready by the 4th quarter for MSRP of $1995. M41 is the steel & wood version and is expected to go for $3000.
This bullpup design allows empty cases to fall below and it is located right behind the magazine well. A lot of parts are modular and can be replaces without too much difficulty.
Magazine release is located right in front of magazine well, charging handle is on the right. Both the front and rear sight can be flipped up or down. Kel-Tec may end up refining a little more and update a few more features.